Sterling Silver Graduated Bead 18 inch Necklace - Mexico

This is an unusual necklace made with 6 sets of 11 graduated silver beads. The beads are strung on joined lengths of silver wire and, with the silver clasp, measures 18", clasped - 37 3/4", unclasped. The beads range in size from approximately 8mm to 22mm in diameter. The total weight of the necklace is 154gm. This is a vintage piece and the condition is very good though one might use minimal polishing with a cloth for maximum shine. The clasp is stamped '925' 'TH-13' 'MEXICO'.